What is MCP Defender?
MCP Defender offers robust, real-time threat protection for AI-driven applications, utilizing advanced large language model (LLM) analysis and deterministic signatures to detect and block security threats. Acting as a secure proxy, it examines all communications between your AI applications and MCP servers, identifying risks like prompt injection, credential theft, arbitrary code execution, and remote command injection before harm occurs.
This open source solution supports seamless integration with popular AI apps, including Cursor, Claude, Visual Studio Code, and Windsurf. MCP Defender runs continuous background scans, ensuring application performance remains unaffected while delivering comprehensive security and user-controlled scanning options. Users can select their preferred LLM provider or use the hosted service for optimal flexibility and protection.
Features
- AI Firewall: Automatically scans and protects all MCP tool calls.
- Advanced LLM-Powered Detection: Identifies and blocks malicious activity using large language models.
- Background Threat Scanning: Monitors AI application activity without impacting performance.
- User-Controlled Scanning: Allows users to manage scan signatures and customize security controls.
- Provider Flexibility: Compatible with various LLM providers or use of MCP's hosted service.
- Open Source: AGPL-3.0 licensed and available on GitHub.
- Multi-Application Support: Integrates with tools like Cursor, Claude, Visual Studio Code, and Windsurf.
- Comprehensive Threat Protection: Guards against prompt injection, credential theft, code execution, and command injection.
Use Cases
- Securing AI-powered development environments from malicious threats.
- Protecting sensitive credentials in collaborative coding applications.
- Defending against prompt injection attacks in LLM-based tools.
- Ensuring compliance and auditability for AI tool usage in enterprises.
- Preventing arbitrary code execution and remote command injections in automated workflows.
FAQs
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Which AI applications are supported by MCP Defender?
MCP Defender supports Cursor, Claude, Visual Studio Code, and Windsurf, with additional applications planned for future integration. -
Is MCP Defender open source?
Yes, MCP Defender is open source and licensed under AGPL-3.0. -
Can I choose which LLM provider to use?
Yes, MCP Defender allows users to select their preferred AI provider or utilize MCP's hosted service. -
What types of threats does MCP Defender protect against?
It protects against prompt injection, credential theft, arbitrary code execution, and remote command injection. -
Does MCP Defender impact the performance of my AI apps?
No, its ultra-fast detection runs in the background without slowing down AI applications.
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MCP Defender Uptime Monitor
Average Uptime
100%
Average Response Time
970.5 ms
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